Load-handling utility vehicle



Aug. 1, 1950 E. G. HUMPAL EFAL LOAD-HANDLING UTILITY VEHICLE Z5 Sheets-Sheet 1 Filed March 17, 1949 M a 6L a /W N. m EPWV 4 z .2 J

g- 1950 E. G. HUMPAL ETAL 2,517,434

LOAD-HANDLING UTILITY VEHICLE Filed March 17, 1949 5 Sheets-Sheet 2 CONTROL I :9 VALVE cHE .K VALVE Q0 t w 63 TANK z PUMP Pay 0. fiAzoa/x g- 1, 1950 E. G. HUMPAL ETAL 2, 1

LOAD-HANDLING UTILITY VEHICLE Filed March 17, 1949 3 Sheets-Sheet s CYLINDER V 60 M Q? I M TAN" E 69 63 72 62 (HoLome) l PUMP l; 5/ 6 L K & TANK PUMP 6/7 75 T (Lowezms) 67 /47 INVENTORJ EUGENE flaMPAL Patented Aug. 1, 1950 r R n N l T E D s'mras 1 E NT oFF l E LOAD-HA'ENBDI'NG UTILITY MYEHIGLE v. Eugene G..Humpal.a -nd Roy Q'lLBaloghliCleveland,

Ohio, a'ssignors to The American Coaloli 8 2'Body .00., Clevelandlflhio, a oorporatiomof Ohio T Application-"March 17, l949g serial N 0.813956 xrolaims. (011212-2435) 1 h .2 This invention relates to a jib crane so mounted edge of thetreartopeningl 5 f the body and may 0 a v thatitvmflybe 11 1g-into andout .extendidly aerossthatopening, as shownin Fig.

l of the Vehicle and be operated to enablelthe li-ftl, orbeswun t th rear for purposes of raising ing, transporting and depositing of a a load from or lowering a load as shownvin Fig. 2, or be swung beyond the confinesof the vehicle intothe vehicle .through theopening into the interior of the body and-vice versa, there being efiective'means on the to deposit or receive the load as indicated by vehicle for so swinging the cranelandefor :operatbroken lines in Fig. 4.

ing its boom to raise or lower a load=suspended Rising from the base frame, along the inner therefrom. edge of the spaced rear wall H, is a vertical post Objects of theinvention are-to provide such m'20in the. form of achannel beam. se ed t device in a very simple form which may be the top-of this post is a short horizontal arm 2| readily mounted on thevehicle and readilyswung extending inwardly and rearwardly. .A downw lytherefrom and operatedin any p siwardly extending bracket 22 is pivoted to this tioniit y given y" manllflllyiicontrolled arm on a vertical pivot'23. The crane arm or mechanism on the vehicle. lZ-he liftingmocha-w booni 25 ispivoted at one end to the bracket 22 nism Comprises d l c: cylinder and-pisto .by a horizontal pivot 26. As indicated in Fig. 4, one attached to the vehiclevframe a-nd.theother the boom is bifurcated and passes onto opposite to the boom. of the crane, there being on the vesides of the bracket 22. A. hydraulic cylinder hicle a suitable hydraulic pumpland a-valve-=and is pivoted on a horizontal pivot 38 to the bracket conduitsto effect the operation. M .30.. A piston 31 (Fig. 5) within the cylinder has Our portable crane mounted andoperatedas its rod 38 pivotally connected at its upper end at above outlined is illustrated in the drawings here- 39 tothe booniZli. A suitable cable'or rod 40 deof and is hereinafter morewfully described. pends vertically from the outer end of the boom In the drawings, Fig. 1 is a rear-elevation-of 'and'terminatesinalift hooktl.

a vehicle equipped with our crane and-aoperating 25 The operation of the piston within the cylinder mechanism andshowing the: crane in idle posioperates to raise or lower the boom, thus'raising tion suitable for thetravelwofthe vehiclea Figs 2 or lowering the load. A lowered position is indiis a vertical longitudinal section throughrthe' rear cated in broken lines at 25a in Figs. 1 and 2 and portion of the vehiclein a plane indicated by the an elevated position at25b in these figures.

line2-2 on Fig. lshowingvthe crane extended l o 'Simplemanual means is provided for turning to the rear of the vehicle; Fig. al horiaontal the bracket Won its axis andthereby swinging sectionin a planewindicated bytheline 3-3, on [the crane as-desired. 3 Weeffect this by securing Figl, showing-the mechanisnu forsmanually a wormwheel to the lower end of the shaft swinging the craneyFigi 4 is a fragmentary plan Stand providin a meshing worm 46, Fig. 3, on

of the crane andthe rear portion oi-the vehicle,,.. ashaft 41 journaled in bearing brdcketsflflcarthe position of the view being indicatedi byv the rie'd by the base frame. A hand crank is proline t el on Fig. l, andshowing inltulhlines the vided torotate the shaft 41. crane in idle position andvin broken linesdi-ffer- The hand crank'fiil'is pivoted on awadial pivot ent operative positions; Fig. 5-is a diagram i-llus- 5| totheshaft 41 sothat the cra nk when idle crating the arrangement of tank pump; valvesvgoumay be turned to therear of thevehicle, as indiand conduits for hydraulically operating the *cated by the broken-linesbilain Fig. 3; so asnot boom of the crane. Figs. 6, 7=-and 8. are diagrams 'to' project beyondthe side of thevehicle. In

showing the valveswin neutral positiontwandnin mse the hancl'crank is swung outwardly into posiposition for raising the load, auditor loweringiit, tion indicated in Fig. 1 and thereby provides respectively. 5 ready means forturning-theworm-dfi and therein Figs. 1., 2 and 4; It indicates thewbodmot a 'by' rotatingthenworm wheel. Land swingingthe vehicle mounted on a suitable lbase frame ii I .procrane as desired. We have found that it issufjecting tothe rear of the body andsupportedwby ficient to manipulate in this manner simply -the wheels indicated at-l2 in. an -suitabIeHm'anner. 1 lower .bracketfifitin swingingthe crane; as the The body id is provided I with awcomparativelyo. 0 cylinder and piston'rod and hence: the boom 'and large opening at its rear .endbetvreen spaced supper bracket turn with .the lower bracket.

end walls IB and H and leading'fromtheibase It will be seen. that byireason .of the'"worm' and frame upwardly substantially to the. roof. 1 worm wheel operation for swinging the cranelthe The jib crane about-tobe described'iscarried same is irreversible andthesl crane remainswin by the vehicle on vertical pivots-adjacentaone. ss iwhatevenlateral position isrgiven it bylthacrank.

Our crane may stand idly across the rear of the vehicle within the confines of the body, as indicated in full lines in Fig. 1, so as to be out of the way of the load carried and still not project beyond the vehicle frame during the travel of the vehicle. Whenever it is desired to use the crane, however, it is readily swung by the crank 50 into a position within the vehicle body, as indicated for instance at 250 in Fig. l, to engage and raise a load therein and thereafter swing outwardly into a position, indicated for instance at 25d, to deposit the load at the rear of the vehicle. Of course, the reverse operation will function to raise a load from the exterior and swing it into the interior of the vehicle.

As heretofore mentioned. suitable hydraulic means are provided for operating the piston in the cylinder 35 to effect raising or lowering of the boom or holding it stationary. An illustrative arrangement of conduits, valves, etc., for this purpose is indicated in the diagram, Fig. 5.

In Fig. 5, 6E! designates a suitable tank carried by the vehicle, 52. a power-operated pump mounted on the vehicle, 54 a manually operable control valve, and lit a pressure-releasable check valve. Suitable conduits connect the various parts as will be apparent from the following description of the operation. I

Oil or other fluid for the operation of the piston in the cylinder is contained in the tank lid, which is provided with a suitable vent or breather ill to prevent internal pressure. A conduit El connects the tank with the pump; a conduit 63 leads from the pump to the control valve M, and conduits 65 and connect the control valve with the pressure-operated check valve, from which a conduit 63 leads to the cylinder. A conduit 69 leads from the control valve back to the tank.

And a more detailed showing of the manually operated control valve and pilot operated check valve is shown in their diiierent positions in Figs. 6, 7 and 8. The control valve is shown as a casing enclosing an axially movable multi-piston valve member 72. The pilot operated check valve includes an internal valve seat '55, toward which a slidable valve i6 is pressed by a spring H. The casing 36 also includes a piston 18 having a rod '59 which may pass through the valve seat and abut the end of the valve i i. The spring ll tends to keep the valve it normally seated, thus closing the passageway from the conduit ill from the control valve. However, when the pressure is admitted by the control valve to the conduit 65 it act against the piston 78 to unseat the valve.

6 shows the valves in a neutral position, which is a holding position for the load. When the valve member '52 is in the position shown in Fig. 6, the pump conduits 63 are out of communication with either the conduit 65 or 61 leading from the control valve. However, the pump con duits are in communication with conduit 6Q leading to the tank. This allows the pump to operate continuously though idly. As the check valve 76 is held seated by its spring ii, the fluid in the conduit ii? and in the lower portion of the cylinder holds the load in whatever position it may have.

To raise the oad the control valve '52 is shifted into the position shown in Fig. 7. In this position one of the pump conduits 63 is connected with the conduit 61 leading to the valve seat of the check valve. The pressure through the conduit 6? unseats the valve, against the action of its spring lfi,so that the fluid is admitted to theconduit 4 68 and passes to the cylinder, thus raising the load.

To lower the load the valve member 12 is shifted to the opposite end of its casing. In this position, shown in Fig. 8, the conduit 65 is connected with the pump while the conduit 61 becomes connected with the tank through the diagonal passage in the end of the valve member 12. The result is that fluid under pressure is admitted to the conduit 65 to act against the piston 78 of the check valve to overcome the action of the spring 11 and unseat the valve. This connects the conduit 68 from the cylinder with the return conduit 61, so that the fluid may pass from the cylinder back to the tank. The weight of the load forces the fluid in the cylinder in this direction as the load lowers by gravity. When the lowering has reached the proper amount, the shifting of the valve member l2 back to neutral position stops the lowering operation and holds any load then suspended on the hook.

Figs. 6 and '7 and 8 indicate at a pressure relief valve of the usual type which is normally idle but may connect the conduit 61 with the conduit 69 back to the tank if the pressure is excessive. This prevents the crane being operated to pick up a heavier load than that for which it is intended.

It will be understood from the description given that we have provided not only a simple jib crane mounted in a convenient manner adjacent the opening to the vehicle body and manually swingable laterally into any position desired, but We have also provided a very convenient hydraulic arrangement effective for raising, lowering and holding the load by fluid pressure delivered by a pump operated by suitable power means on the vehicle. The manual control valve for such hydraulic operation is preferably located adjacent the crank 50 for swinging the crane laterally so that all operations may be readily effected by an operator standing on the ground at the side of the vehicle and adjacent the rear end, where he may readily observe the operation.

We claim:

1. The combination of a vehicle having a body with an opening to the interior, a pair of brackets carried by the body one above the other, each bracket being pivotally mounted on a vertical pivot, a boom pivoted to the upper bracket by a horizontal pivot, a piston and cylinder couple, one member of which is pivoted to the lower bracket on a horizontal pivot and the other member of which is pivoted to the intermediate region of the boom, the lower bracket being swiveled by a vertical shaft rotatably mounted in the body, a worm wheel on said shaft, a worm meshing therewith and a crank for operating the worm.

2. The combination of a vehicle having a body with an opening therein, an upright post carried by the body adjacent one vertical edge of the opening, a fixed arm at the top of said post, a bracket pivoted on a vertical pivot to said arm, another bracket pivoted on a vertical pivot to the floor frame of the vehicle, said two vertical pivots axially aligning, a boom pivoted on a horizontal pivot to the upper bracket, and extensible means pivoted at its lower end to the lower bracket on a horizontal pivot and pivoted to the boom on a horizontal pivot, and a load-engaging member depending from the boom.

3. The combination of a vehicle having a body with an opening at its rear end, an upright post extending along one edge of the body opening, a horizontal arm at the top of the post, a bracket pivoted on a vertical pivot to the arm, a vertical shaft mounted in the base frame of the vehicle in alignment with said vertical pivot, a bracket carried by the shaft, a boom pivoted On a horizontal pivot to the upper bracket, extensible means pivoted on a horizontal pivot to the lower bracket and pivoted at its upper end to the boom, a load supporting member depending from the free end of the boom, means for operating said extensible mechanism to raise the boom, and means for turning said shaft to swing the boom and extensible mechanism laterally.

4. The combination of a vehicle having a base frame and a body with an opening therein, a vertical post carried by the body adjacent one vertical edge of the opening, an arm rigidly carried by the top of the post, a bracket pivoted to the arm on a vertical pivot, a shaft rotatably mounted in the base frame in axial alignment with said vertical pivot, a bracket carried by said shaft, a boom pivoted to the first-mentioned bracket, a piston and cylinder couple pivoted at one end to the second-mentioned bracket and at the other end to the boom, a manually operated shaft carried by the base frame, and gearing connecting the last-mentioned shaft with said vertical shaft.

5. The combination of a vehicle having a base frame and a body with an opening therein, a vertical post carried by the body adjacent one vertical edge of the opening, an arm rigidly carried by the top of the post, a bracket pivoted to the arm on a vertical pivot, a vertical shaft mounted in the base frame in axial alignment with said vertical pivot, a bracket carried by said shaft, a boom pivoted to the first-mentioned bracket, extensible means pivoted at one end to the second-mentioned bracket and at the other end to the boom, a horizontal shaft carried by the base frame, gearing connecting said horizontal shaft with said vertical shaft, and a crank pivoted to the outer end of the horizontal shaft and adapted to stand within the side confines of the vehicle or be in a position beyond the side of the vehicle.

6. The combination with a vehicle having a body with an opening at the rear end, a jib crane pivoted to the body on vertical pivots adjacent one vertical edge of the opening, a piston and cylinder couple for operating the boom of the jib crane, means geared with the jib crane to swing it laterally, said means terminating in a manual crank at the rear of the vehicle adapted to stand at the side thereof, a power operated pump on the vehicle, a manual control valve and conduits on the vehicle connecting the pump with the cylinder, said manual control valve being located adjacent said crank whereby the load supported by the jib crane may be raised, lowered, swung laterally by an operator at the side of the vehicle.

7. The combination of a vehicle having a. body with an entrance opening, a jib crane comprising a boom pivoted at one end to the body and a piston and cylinder couple pivoted at one end to the body and at the other end to the boom, the pivots to the body being adjacent one vertical edge of said opening, means for swinging the boom and piston and cylinder couple laterally, a power-operated pump on the vehicle, a manual control valve and a pilot-operated check valve on the vehicle, and conduits connecting the pump, control valve and check valve with the cylinder to enable the actuation of the piston to raise the load and to hold the piston stationary to hold the load and to allow the'loweringof the piston by the weight of the load.

EUGENE G. HUMPAL. ROY O. BALOGH.

REFERENCES CITED The following references are ofrecord. in the file of this patent:

UNITED STATES PATENTS Number Name Date 925,968 Webb June 22, 1909 1 1,021,585 Ewert Mar. 26, 1912 2,374,045 Soucia Apr. 1'7, 1945 

